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On 03/02/13 15:07, Gordon Henderson wrote: > On Sun, 3 Feb 2013, Peter Lloyd-Jones wrote: > >> On 1 February 2013 17:15, e-mail greybear2k5 >> <greybear2k5@xxxxxxxxxxxxxxxx>wrote: >> >>> I have a 40 year old working analogue computer, results are not too >>> precise but near enough for many uses. >>> It's called a slide rule. >> >> Hi Jimbo >> >> But they never managed to solve the floating decimal point problem! > > I don't recall floating point being a problem when I've used slide > rules. The knack is to be able to work out the right magnitude of the > result in your head then work from there. > > So - Pi * 724 is going to be 2 thousand and something, so about 2270 > on the slide rule: http://unicorn.drogon.net/slide.jpg > > Hm. It's a bit grubby. Maybe I ought to clean it up a bit. > > Gordon > Oooh! I remember British Thornton. I've got an AD 150 I used at school....really fancied one of the cylindrical ones though. Phil -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq